The Queen of England owns a retail park in Slough, which has a drive-thru McDonald's

The Egg McMuffin was modeled on eggs Benedict

Herb Peterson invented the Egg McMuffin as a way to introduce breakfast to McDonald's restaurants. From MSNBC:

"Peterson came up with idea for the signature McDonald's breakfast item in 1972. He "was very partial to eggs Benedict," Fraker said, and worked on creating something similar.

The egg sandwich consisted of an egg that had been formed in a Teflon circle with the yolk broken, topped with a slice of cheese and grilled Canadian bacon. It was served open-faced on a toasted and buttered English muffin."